Research On The Teaching Innovation Of Metal Electrochemical Corrosion Based On Literacy

The electrochemical corrosion and protection of metals is located in the electrochemical basis section of the principle of chemical reaction,a standard experimental textbook for senior high school curriculum published in the pep edition.Its content is not only closely related to the real life,but also the teaching emphasis and difficulty of senior high school chemistry.At present,in the real teaching process,due to the limited teaching methods adopted by teachers,students are in the passive and mechanical shallow learning,unable to effectively form the cognitive model of electrochemical corrosion,let alone achieve the high-level learning of comprehensive application.Therefore,how to formulate effective teaching strategies and evaluate the teaching effect of cases is the focus of this study.Through research analysis of the current school students based on electrochemical corrosion of metal and protective section of learning disabilities,designed several groups of experiments,explore in different acid and alkaline electrolyte solution,nails electrochemical corrosion of reactants and products,in the process of reasoning the experimental conclusion,help students understand the principle of electrochemical corrosion of iron and steel;To ensure complete the teaching mission in the practical teaching environment,based on the exploration on the basis of experimental data,the development of electrochemical corrosion of steel simulation teaching software,not only provides the classroom inquiry condition,analyses the micro process of electrochemical corrosion at the same time,help students cognitive model of electrochemical corrosion,to generate a teaching case.By studying relevant literature and new curriculum standards,the author designed a set of assessment questions on electrochemical corrosion and protection of metals from the perspective of literacy,which were modified and improved with the Suggestions of 10 experts.Two classes in a high school in C city were selected as the experimental class and the control class.After the teaching implementation was completed with innovative and traditional teaching methods,the teaching effect was evaluated with the test questions.The results show that under the conditions of this study,the attainment-oriented teaching innovation of electrochemical corrosion of metal is helpful to cultivate students' attainments of "evidential reasoning and model cognition".This paper adopts literature research method,interview method,questionnaire survey method and expert consultation method to conduct research.The research content is divided into five chapters:The first chapter introduces the domestic and foreign research background of "electrochemical corrosion and protection of metals" and "evidential reasoning and model cognition" accomplishment,analyzes the feasibility of this research,clarifies the research purpose and content,and formulates the research framework.In the second chapter,the concepts of "evidentiary reasoning","model cognition","electrochemical corrosion of metals" and "electrochemical protection of metals" are defined,and analyzes the current research status and shortcomings of electrochemical corrosion and protection of metals.The third chapter is the focus of this study,with a number of front-line teachers in teaching methods and students' learning disabilities conducted interviews,based on interviews,literature analysis and the ordinary high school chemistry curriculum standard,design the steel corrosion of hydrogen evolution and oxygen corrosion of inquiry experiment,the interactive teaching software and the relevant teaching activities,to generate the model based on evidence reasoning and cognition of the electrochemical corrosion of metal,the metal electrochemical protection the innovation of teaching cases.The fourth chapter is based on the literature research and the level of literacy of the new curriculum standard developed in this paper,the quality of evidence reasoning and model recognition level division standard and design based on the perspective of literacy assessment of electrochemical corrosion and protection of metal in exam and a selection of C city middle school grade two parallel classes to teaching,to analyze the effect of teaching cases.The fifth chapter is the conclusion,deficiency and enlightenment of this research.Through the study found that: compared with the traditional teaching methods,students can better grasp the steel cognitive model of electrochemical corrosion,can according to the different characteristics of the formation of hydrogen oxygen corrosion and corrosion sufficient evidence,can choose different models to solve complex metal corrosion problems,based on evidence reasoning and model recognition metal electrochemical corrosion and protection of innovative teaching to explore the teaching effect of a certain.